character

问题 I'm probably missing something, but why are the two numeric values equal to -1 ? System.out.println(Character.getNumericValue(Character.MAX_VALUE)); System.out.println(Character.getNumericValue(Character.MIN_VALUE)); Returns: -1 -1 回答1: getNumericValue() will convert characters that actually represent numbers (like the "normal" digits 0-9, but also numerals in other scripts) to their numeric value. The Characters represented by Character.MAX_VALUE and Character.MIN_VALUE do not have such a

问题 My program is suppose to count the occurrence of each character in a file ignoring upper and lower case. The method I wrote is: public int[] getCharTimes(File textFile) throws FileNotFoundException { Scanner inFile = new Scanner(textFile); int[] lower = new int[26]; char current; int other = 0; while(inFile.hasNext()){ String line = inFile.nextLine(); String line2 = line.toLowerCase(); for (int ch = 0; ch < line2.length(); ch++) { current = line2.charAt(ch); if(current >= 'a' && current <= 'z

问题 This question already has answers here : What are the Java semantics of an escaped number in a character literal, e.g. '\15' ? (3 answers) Closed last year . I've seen this char defined as char ch = '\117' What kind of representation is '\117' in? I know escaped-sequence is '\n' , for instance, or unicode is `\udddd' , where d is a single hex digit, but I've never seen such thing as '\117' in my entire life! Surprisingly, it does compile! (And the output is O ) 回答1: This is the octal

问题 This is the program to convert a Roman number (for example VI) to a decimal. The algorithm is writing a function that recognize each element of the input string and return the corresponding value in decimal. We got char Roman_num[20] For each element, sum+=value(Roman_num[i]) .The function prototype is int value (char digit) .It results in the ' Invalid conversion from char to char *' error. However, when passing each element's address &a[i] to the function and changing the prototype to int

问题 I am experiencing some difficulty in my home project where I need to parse a SOAP request. The SOAP is generated with gSOAP and involves string parameters with special characters like the danish letters "æøå". gSOAP builds SOAP requests with UTF-8 encoding by default, but instead of sending the special chatacters in raw format (ie. bytes C3A6 for the special character "æ") it sends what I think is called character hash references (ie. æ). I don't completely understand why gSOAP does it this

问题 Does anyone know what the best method would be to work out how many characters can fit inside a DIV block in HTML using JavaScript? Any advise would greatly help. 回答1: You could iteratively add your characters to a hidden div and check the width of that. Not sure if there is a better way. Edit: Something like this: var targetWidth = document.getElementById('DivToCheck').clientWidth; var stringToFit = 'abcdefghijk'; var numChars = 0; for(var i=0; i < stringToFit.length; i++) { document

问题 I am relatively new to R. I have a dataframe that has a column stored as a list. My column contain c("Benzo", "Ferri") or character(0) if it's empty. How can I change them to simply Benzo, Ferri and an empty string for character(0) instead? I'm not able to, for instance df$general_RN <- unlist(df$general_RN) because Error in $<-.data.frame(*tmp*, general_RN, value = c("Drug Combinations", : replacement has 1992 rows, data has 10479 I am assuming that all the character(0) have been removed but

问题 In PHP I would use this: $text = "Je prends une thé chaud, s'il vous plaît"; $search = array('é','î','è'); // etc. $replace = array('e','i','e'); // etc. $text = str_replace($search, $replace, $text); But the Java String method "replace" doesn't seem to accept arrays as input. Is there a way to do this (without having to resort to a for loop to go through the array)? Please say if there's a more elegant way than the method I'm attempting. 回答1: A really nice way to do it is using the

问题 I have a bunch of mp3 files that somehow have a special character in the 0th index. So the file name looks like this - ▶ Alone Tonight - Radio Edit - Above & Beyond .mp3 I want to be able to fix this. In python, when I list the file, it shows up like this: '? Alone Tonight - Radio Edit - Above & Beyond .mp3' All I want to do is to rename this file with the substring defined by [2:len(filename)] However, when I do this: newfilename = filename[2:len(filename)] os.rename(filename,newfilename) I

问题 Currently, I add a pound sterling (£) sign to the Java source and compile the resulting Swing component shows as the square (unsupported character) symbol. I suspect it's an encoding problem, the Java source file is encoded as cp1252 (Eclipse seems to default to this). What's the correct way of resolving this? 回答1: Use the \u00A3 notation. Further examples here for the unicodes Unicode code points for other symbols. 回答2: I believe you can change the source code's encoding from Eclipse (or